<template>
  <main role="main">
    <div class="header-nav">
      <div class="clearfix">
        <div class="container">
          <div class="row">
            <div class="col-12">
              <a v-on:click="onClickLevel1('00000000')" id="category-00000000" href="javascript:;" class="cur">全部</a>
              <a v-for="o in level1" v-on:click="onClickLevel1(o.id)" v-bind:id="'category-' + o.id" href="javascript:;">{{o.name}}</a>
            </div>
          </div>
        </div>
      </div>
    </div>
    <div class="skill clearfix">
      <div class="container">
        <div class="row">
          <div class="col-12">
            <a v-on:click="onClickLevel2('11111111')" id="category-11111111" href="javascript:;" class="on">不限</a>
            <a v-for="o in level2" v-on:click="onClickLevel2(o.id)" v-bind:id="'category-' + o.id" href="javascript:;">{{o.name}}</a>

            <div style="clear:both"></div>
          </div>
        </div>
      </div>
    </div>
    <div class="album py-5 bg-light">
      <div class="container">
        <div class="row">
          <div class="col-md-12">
            <pagination ref="pagination" v-bind:list="listTravel"></pagination>
          </div>
        </div>
        <br>
        <div class="row">
          <div v-for="o in travels" class="col-md-4">
            <the-travel v-bind:travels="o"></the-travel>
          </div>
          <h3 v-show="travels.length === 0">暂时平台没有活动</h3>
        </div>
      </div>
    </div>
  </main>
</template>

<script>
import TheTravel from "../components/the-travel";
import Pagination from "../components/pagination";


export default {
  components: {Pagination, TheTravel},
  name: 'list',
  data: function () {
    return {
      travels: [],
      level1:[],
      level2:[],
      categorys:[],
      level1Id: "",
      level2Id: "",
    }
  },
  mounted() {
    let _this = this;
    _this.$refs.pagination.size = 6;
    _this.listTravel(1);
    _this.allCategory();
  },
  methods: {
    listTravel(page){
      let _this = this;
      _this.$ajax.post('http://127.0.0.1:9000/business/web/travel/list',{
        page:page,
        size:_this.$refs.pagination.size,
        categoryId: _this.level2Id || _this.level1Id || "", // 优先取level2Id
      }).then((response)=>{
        let resp = response.data;
        if (resp.success){
          _this.travels =resp.content.list;
          _this.$refs.pagination.render(page,resp.content.total);
        }
      }).catch((response)=>{
        console.log("error",response);
      })
    },
    /**
     * 列表查询
     */
    allCategory() {
      let _this = this;
      _this.$ajax.post('http://127.0.0.1:9000/business/admin/category/all').then((response)=>{
        let resp = response.data;
        let categorys = resp.content;
        _this.categorys = categorys;

        // 将所有记录格式化成树形结构
        _this.level1 = [];
        for (let i = 0; i < _this.categorys.length; i++) {
          let c = _this.categorys[i];
          if (c.parent === '00000000') {
            _this.level1.push(c);
          }else {
            _this.level2.push(c);
          }
        }
      })
    },
    /**
     * 点击一级分类时
     * @param level1Id
     */
    onClickLevel1(level1Id) {
      let _this = this;

      // 点击一级分类时，设置变量，用于课程筛选
      // 二级分类id为空，
      // 如果点击的是【全部】，则一级分类id为空
      _this.level2Id = null;
      _this.level1Id = level1Id;
      if (level1Id === "00000000") {
        _this.level1Id = null;
      }

      // 点击一级分类时，显示激活状态
      $("#category-" + level1Id).siblings("a").removeClass("cur");
      $("#category-" + level1Id).addClass("cur");

      // 点击一级分类时，二级分类【无限】按钮要设置激活状态
      $("#category-11111111").siblings("a").removeClass("on");
      $("#category-11111111").addClass("on");

      // 注意：要先把level2中所有的值清空，再往里放
      _this.level2 = [];
      let categorys = _this.categorys;
      // 如果点击的是【全部】，则显示所有的二级分类
      if (level1Id === '00000000') {
        for (let i = 0; i < categorys.length; i++) {
          let c = categorys[i];
          if (c.parent !== "00000000") {
            _this.level2.push(c);
          }
        }
      }
      // 如果点击的是某个一级分类，则显示该一级分类下的二级分类
      if (level1Id !== '00000000') {
        for (let i = 0; i < categorys.length; i++) {
          let c = categorys[i];
          if (c.parent === level1Id) {
            _this.level2.push(c);
          }
        }
      }

      // 重新加载课程列表
      _this.listTravel(1);
    },

    /**
     * 点击二级分类时
     * @param level1Id
     */
    onClickLevel2(level2Id) {
      let _this = this;
      $("#category-" + level2Id).siblings("a").removeClass("on");
      $("#category-" + level2Id).addClass("on");

      // 点击二级分类时，设置变量，用于课程筛选
      // 如果点击的是【无限】，则二级分类id为空
      if (level2Id === "11111111") {
        _this.level2Id = null;
      } else {
        _this.level2Id = level2Id;
      }

      // 重新加载课程列表
      _this.listTravel(1);
    },
  }
}
</script>
<style>
/* 头部 一级分类 */
.header-nav {
  height: auto;
  background: #fff;
  box-shadow: 0 8px 16px 0 rgba(28,31,33,.1);
  padding: 16px 0;
  box-sizing: border-box;
  position: relative;
  z-index: 1;
  /*background-color: #d6e9c6;*/
}
.header-nav>div {
  width: 100%;
  padding-left: 12px;
  box-sizing: border-box;
  margin-left: auto;
  margin-right: auto;
  /*background-color: #B4D5AC;*/
}
.header-nav a {
  float: left;
  font-size: 16px;
  color: #07111b;
  line-height: 50px;
  height: 45px;
  position: relative;
  margin-right: 46px;
  font-weight: 700;
}
.header-nav a:hover {
  color: #c80;
}
.header-nav a.cur {
  color: #c80;
}
.header-nav a.cur:before {
  display: block;
}
.header-nav a:before {
  display: none;
  content: ' ';
  position: absolute;
  bottom: 0;
  background: #c80;
  width: 16px;
  height: 3px;
  left: 50%;
  margin-left: -8px;
}
/* 二级分类 */
.skill {
  width: 100%;
  padding: 24px 0 0;
  position: relative;
  margin: 0 auto;
}
.skill a.on {
  color: #c80;
  background: rgba(204,136,0,.1);
}
.skill a {
  float: left;
  margin-right: 20px;
  padding: 0 12px;
  font-size: 14px;
  color: #4d555d;
  line-height: 32px;
  border-radius: 6px;
  margin-bottom: 12px;
}
.skill a:hover {
  background: #d9dde1;
}
</style>
